PHASE-DIAGRAM AND SUPERCOOLING CONDITIONS FOR THE CA(NO3)2-CACL2-H2O SYSTEM

The liquidus temperature and induction periods were measured for crystallization in a system of calcium nitrate, calcium chloride, and water over a concentration range of 5-20 mole% Ca(II), i.e., R=4-18 [R=moles H2O/moles Ca(II)] and ycl=0-1 [ycl=moles Cl-/moles (NO3-+Cl-)]. A ternary phase diagram was constructed, and qualitative dependences of the supercooling at which the solution began to crystallize on the system composition were found. A wide range of stability toward crystallization was found for solutions with R=4-10 and ycl=0-0.7 The relationships between the system stability toward crystallization and the viscosity, glass-transition temperature, and the liquidus temperature are discussed. © 1979 Plenum Publishing Corporation.